StrangerDanger has helped countless amounts of people with there Benelli's. I personally cannot count the amount of times I've referenced his material when I double guess myself or haven't a clue to begin with. The amount of time it takes him to take photos mid process and type his extensive explanations is all to often over looked or taken for granted. Thank you Stranger Danger!
I've shared this photo before here on the forum, I dont know why it wouldn't show up on a Google search for:
1014 recoil tube depth
Benelli M4 recoil tube depth
Benelli 1014 recoil tube depth
Benelli M4 recoil tube picture
Maybe it will help someone in the future...